System and method for data compression and decompression
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United States of America Patent
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Aug 29, 2006
Grant Date -
Jun 10, 2004
app pub date -
Dec 24, 2002
filing date -
Dec 6, 2002
priority date (Note) -
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Abstract
A data compressor is provided which performs substitution-based data encoding. The compressor identifies repetitive data of an input file and writes meta-data representative of the repetitive data to a first buffer using a triple structure. The triple structure includes information of a length of non-repetitive data preceding repetitive data, an offset between like groups of repetitive data, and a length of the repetitive data. Non-repetitive data is written to a second buffer. The compressor concatenates the first and second buffers along with information of the length of the input file and the length of the first buffer to form a compressed file. A corresponding decompressor parses the compressed file and quickly computes the original file using a pre-allocated memory area.
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